Computer Communications: Bus Network
.... central computer, which
handles any further routing (as to another node) that might be necessary. A star
network is reliable in the sense that a node can fail without affecting any
other node on the network. Its weakness, however, is that failure of the central
computer results in a shutdown of the entire network. And because each node is
individually wired to the hub, cabling costs can be high.Ring networkRing
Network, in computer science, a local area network in which devices (nodes) are
connected in a c .....
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Computer Programming
.... programmer must thoroughly testing and
revising it. Generally, programmers create software by using the following a
basic step-by-step development process:
(1) Define the scope of the program by outlining exactly what the program
will do.
(2) Plan the sequence of computer operations, usually by developing a
flowchart (a diagram showing the order of computer actions and
data flow).
(3) Write the code--the program instructions encoded in a particular
progr .....
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Object-Oriented Database Management Systems
.... data models can be
big and substantial. Second is the common theoretical framework. Although
there is no standard object-oriented model, most object-oriented database
systems that are operational or under development today share a set of
fundamental object-oriented concepts. Therefore the implementation issues
in OODBMSs that arise due to these concepts are universal. The third
characteristic is that of experimental activity. Plenty of prototypes have
been implemented and some of them became commercial .....
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Computer Crime
.... when he, without authorization,
intentionally or recklessly disrupts or degrades or causes the disruption or
degradation of computer services or denies or causes the denial of computer
services to an authorized user of a computer system.
(e) Misuse of computer system information. A person is guilty of the computer
crime of misuse of computer system information when: (1) As a result of his
accessing or causing to be accessed a computer system, he intentionally makes or
causes to be made an unauthor .....
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Computer Crime: A Increasing Problem
.... the military, and
the economy could not operate without the use of computers. Banks transfer
trillions of dollars every day over inter-linking networks, and more than one
billion pieces of electronic mail are passed through the world's networks daily.
It is the age of the computer network, the largest of which is known as the
InterNet. A complex web of communications inter-linking millions of computers
together -- and this number is at least doubling every year. The computer was
originally designed as a .....
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Computer Pornography
.... Act of 1996. In the TA there is a part called the
Communications Decency Act or CDA. This part of the bill arose because of the
recent surge of pornography on the Infobahn. The CDA criminalizes indecent
speech on the Internet(Wallace: 1). The CDA describes indecent speech as
anything "depicting or describing sexual or excretory acts or organs in
patently offensive fashion under contemporary community standards."
First take the word "indecent". This word is used because of its vague
definition. Not on .....
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Computers And Crime
.... to other criminals, ascribing characteristics somehow different from
'normal' individuals, but that is not the case."(Sharp, 18:3) It is believed
that the computer criminal "often marches to the same drum as the potential
victim but follows and unanticipated path."(Blumenthal, 1:2) There is no actual
profile of a computer criminal because they range from young teens to elders,
from black to white, from short to tall.
Definitions of computer crime has changed over the years as the users
and .....
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The History And Future Of Computers
.... is
usually accredited to Blaise Pascal. In 1642 he made the device to aid his
father, who was a tax collector. In 1694 Gottfried Leibniz improved the machine
so that with the rearrangement of a few parts it could be used to multiply. The
next logical advance came from Thomas of Colmar in 1890, who produced a machine
that could perform all of the four basic operations, addition, subtraction,
multiplication and division. With the added versatility this device was in
operation up until the First World .....
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Computer Viruses
.... ¨ Jokes ¨ Test files
THE DAMAGE ROUTINE
Damage is defined as something that you would prefer not to have happened. It is
measured by the amount of time it takes to reverse the damage.
Trivial damage happens when all you have to do is get rid of the virus. There
may be some audio or visual effect; often there is no effect at all.
Minor damage occurs when you have to replace some or all of your executable
files from clean backups, or by re-installing. Remember to run FindVirus again
afterwards.
Mo .....
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Information About Viruses
.... such as the .EXE and .COM files. On a Macintosh, any
file can be contaminated. A disk can also be infected even without any files on
it. These viruses are called BOOT SECTOR viruses. These viruses reside on the
part of the floppy disk, or hard disk that store the information so that these
disks can be used, and is loaded into memory each time the computer is booted by
one of these disks.
DON'T DESPAIR!
Despite all of what has just been said, viruses are controllable. Their .....
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Data Security
.... dollars in overdue property taxes (Secure
Commerce on The Internet 12). The corporation Citibank also had an
incident in 1995 in which Russian hackers stole over 10,000,000 dollars in
fraudulent wire transfers by exploiting a hole in it's systems provision
for money transfers. It cost the Italian government over 225,000 to repair
a glitch in The Rome Air Force Base's system. The telecommunications giant
of the west Southwestern Bell had a problem with a hacker named
Christopher Schanot that cost the .....
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Computer Viruses: Past, Present And Future
.... to replicate and spread, generally with
the victim being oblivious to its existence. Computer viruses spread by
attaching themselves to other programs (e.g., word processors or spreadsheets
application files) or to the boot sector of a disk. When an infected file is
activated - or executed - or when the computer is started from an infected disk,
the virus itself is also executed. Often, it lurks in computer memory, waiting
to infect the next program that is activated, or the next disk that is accesse .....
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Biometric Systems
.... the biometric market. There are also many
significant niche markets which are growing rapidly. For example, biometric
identification cards are being used at a university in Georgia to allow students
to get their meals, and in a Maryland day care center to ensure that the right
person picks up the right child. In Los Angeles, they are using fingerprints to
stop welfare fraud. And they're also being used by frequent business travellers
for rapid transit through immigration and customs in Holland, and now a .....
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Airplanes
.... of the fuselage. These designs are referred to as high-,
mid-, and low-wing, respectively. The number of wings can also vary.
Airplanes with a single set of wings are referred to as monoplanes, while
those with two sets are called biplanes.
To help fly the airplane, the wings have two types of control surfaces
attached to the rear, or trailing, edges. They are referred to as ailerons
and flaps. Ailerons extend from about the midpoint of each wing outward to
the tip. They move in opposite directio .....
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Computers In Education
.... beams of the satellite rather than simply the two ends of the
microwave link.
Computer Crime
Computer crime is defined as any crime involving a computer accomplished through
the use or knowledge of computer technology. Computers are objects of crime when
they or their contents are damaged, as when terrorists attack computer centres
with explosives or gasoline, or when a "computer virus" a program capable of
altering or erasing computer memory is introduced into a computer system.
Personal Computer
.....
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